You know the Roomba from iRobot? It's the robot vacuum cleaner that is supposed to do the work on its own so that you don't have to. I've seen video of the thing picking up dirt and junk but I've always been skeptical that it would cover all areas.
Well the above, from Signal Theorist, is the Roomba coverage over a half an hour. A camera was setup, the lights were turned off, and the above is a long exposure shot of the Roomba's path. Not bad huh?
[via Simple Complexity]